.TH std::ratio_divide 3 "2024.06.10" "http://cppreference.com" "C++ Standard Libary"
.SH NAME
std::ratio_divide \- std::ratio_divide

.SH Synopsis
   Defined in header <ratio>
   template< class R1, class R2 >         \fI(since C++11)\fP
   using ratio_divide = /* see below */;

   The alias template std::ratio_divide denotes the result of dividing two exact
   rational fractions represented by the std::ratio specializations R1 and R2.

   The result is a std::ratio specialization std::ratio<U, V>, such that given Num ==
   R1::num * R2::den and Denom == R1::den * R2::num (computed without arithmetic
   overflow), U is std::ratio<Num, Denom>::num and V is std::ratio<Num, Denom>::den.

.SH Notes

   If U or V is not representable in std::intmax_t, the program is ill-formed. If Num
   or Denom is not representable in std::intmax_t, the program is ill-formed unless the
   implementation yields correct values for U and V.

   The above definition requires that the result of std::ratio_divide<R1, R2> be
   already reduced to lowest terms; for example, std::ratio_divide<std::ratio<1, 12>,
   std::ratio<1, 6>> is the same type as std::ratio<1, 2>.

.SH Example


// Run this code

 #include <iostream>
 #include <ratio>

 int main()
 {
     using two_third = std::ratio<2, 3>;
     using one_sixth = std::ratio<1, 6>;
     using quotient = std::ratio_divide<two_third, one_sixth>;
     static_assert(std::ratio_equal_v<quotient, std::ratio<0B100, 0X001>>);
     std::cout << "(2/3) / (1/6) = " << quotient::num << '/' << quotient::den << '\\n';
 }

.SH Output:

 (2/3) / (1/6) = 4/1

.SH See also

   ratio_multiply multiplies two ratio objects at compile-time
   \fI(C++11)\fP        (alias template)
